Loch Lomond Brewery has partnered with Castle Rock on a new teacake stout to be launched primarily in cask, with a limited keg release.
Left to right: Alex Handford, sales manager at Loch Lomond Brewery; Carl Duke, sales at Castle Rock; Scott Murray, lead brewer at Loch Lomond; and Matt Cooper, assistant brewery manager at Castle Rock
Fit to Fly (4.1% ABV), made with cacao nibs in the mash, takes its name from the story of RAF fighter pilots in the 1960s who allegedly had to ban their favourite chocolate covered teacakes from training sorties after a series of cockpit marshmallow explosions.
Last year, the RAF Centre of Aerospace Medicine gave pilots the all-clear to fly with the sweet treats after tests in an altitude chamber found they did not explode in today’s cockpits.
The two brewers have collaborated previosly. In 2025, they created Pub Tropicana, a 3.8% ABV tropical IPA brewed with Dolcita and Citrus hops.
The new beer will be available through Loch Lomond Brewery and across the 21-strong Castle Rock pub and bar estate in the East Midlands.
“Our brewing teams hit it off straight away when we first met at BeerX in Liverpool a couple of years ago,” said Euan MacEachern, head brewer and distiller at Loch Lomond Brewery.
“We share the same values and attitudes towards creating great beer, and it worked really well with our Pub Tropicana release last year. We are confident this one will be a real winner, and the spirit of fun we share will come through in every pint.”
